﻿//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
namespace AbstractSaaSTemplate.Utility.Tests.UI.Utilities.FakeHttpObjects{    using System;
    using System.Collections.Generic;
    using System.Globalization;
    using System.Web;
    using System.Web.SessionState;

    /// <summary>
    /// A Class to allow simulation of SessionObject
    /// </summary>
    public class MockHttpSession : HttpSessionStateBase, IHttpSessionState
    {
        /// <summary>
        /// Keeps the storage for the session
        /// </summary>
        private IDictionary<string, object> sessionStorage = new Dictionary<string, object>();

        /// <summary>
        /// Keeps the session id.
        /// </summary>
        private string sessionId = Guid.NewGuid().ToString();

        /// <summary>
        /// Keeps the culture LCID
        /// </summary>
        private int lcid = CultureInfo.CurrentUICulture.LCID;

        /// <summary>
        /// Initializes a new instance of the MockHttpSession class.
        /// </summary>
        public MockHttpSession()
        {
            // there are errors which just happen during the tests
            // because of the problems with mocking the context.
            const string LauncherKey = "launcher";
            const string LauncherValue = "unit-test";

            if (!this.sessionStorage.ContainsKey(LauncherKey))
            {
                lock (this.sessionStorage)
                {
                    if (!this.sessionStorage.ContainsKey(LauncherKey))
                    {
                        this.sessionStorage.Add(
                            LauncherKey,
                            LauncherValue);
                    }
                }
            }
        }

        /// <summary>
        /// Initializes a new instance of the MockHttpSession class.
        /// </summary>
        /// <param name="currentSession">The current session that will be kept alive.</param>
        public MockHttpSession(HttpSessionState currentSession)
            : this()
        {
            this.sessionId = currentSession.SessionID;
            this.lcid = currentSession.LCID;

            foreach (var sessionItem in currentSession)
            {
                var key = sessionItem as string;
                if (!this.sessionStorage.ContainsKey(key))
                {
                    lock (this.sessionStorage)
                    {
                        if (!this.sessionStorage.ContainsKey(key))
                        {
                            this.sessionStorage.Add(
                                key,
                                currentSession[key]);
                        }
                    }
                }
            }
        }

        /// <summary>
        /// Gets a collection of objects declared by [object Runat="Server" Scope="Session"/]
        /// tags within the ASP.NET application file Global.asax.
        /// </summary>
        /// <returns>An System.Web.HttpStaticObjectsCollection containing objects declared in the Global.asax file.</returns>
        public new HttpStaticObjectsCollection StaticObjects
        {
            get { return this.StaticObjects; }
        }

        /// <summary>
        /// Gets When overridden in a derived class, gets the unique identifier for the session.
        /// </summary>
        public override string SessionID
        {
            get
            {
                return this.sessionId;
            }
        }

        /// <summary>
        /// Gets or sets the locale identifier (LCID) of the current session.
        /// </summary>
        public override int LCID
        {
            get
            {
                return this.lcid;
            }

            set
            {
                this.lcid = value;
            }
        }

        /// <summary>
        /// Gets the session state value for a particular key.
        /// </summary>
        /// <param name="key">Gets or sets a session value by numerical index.</param>
        /// <returns>Returns the object stored for that key</returns>
        public override object this[string key]
        {
            get
            {
                if (!this.sessionStorage.ContainsKey(key))
                {
                    return null;
                }

                return this.sessionStorage[key];
            }

            set
            {
                this.sessionStorage[key] = value;
            }
        }

        /// <summary>
        /// Returns the enumerator.
        /// </summary>
        /// <returns>The enumerator returned.</returns>
        public override System.Collections.IEnumerator GetEnumerator()
        {
            return this.sessionStorage.Keys.GetEnumerator();
        }
    }
}


